tests for the template engine

[friendica.git] / include / template_processor.php

diff --git a/include/template_processor.php b/include/template_processor.php
index 0d476f0e6e63f54a15f88dc69ebd514f58a22934..06c49a7083c83b21986c9629734b3ba75d60ada3 100755 (executable)
--- a/include/template_processor.php
+++ b/include/template_processor.php
@@ -1,5 +1,5 @@
 <?php
-
+       define ("KEY_NOT_EXISTS", '^R_key_not_Exists^');
 
        class Template {
                var $r;
@@ -28,32 +28,21 @@
                        die();
                }
                
-               private function _build_replace($r, $prefix){
-       
-                       if(is_array($r) && count($r)) {
-                               foreach ($r as $k => $v ) {
-                                       if (is_array($v))
-                                               $this->_build_replace($v, "$prefix$k.");
-                                       
-                                       $this->search[] =  $prefix . $k;
-                                       $this->replace[] = $v;
-                               }
-                       }
-               } 
                
                private function _push_stack(){
-                       $this->stack[] = array($this->r, $this->search, $this->replace, $this->nodes);
+                       $this->stack[] = array($this->r, $this->nodes);
                }
                private function _pop_stack(){
-                       list($this->r, $this->search, $this->replace, $this->nodes) = array_pop($this->stack);
+                       list($this->r, $this->nodes) = array_pop($this->stack);
                        
                }
                
-               private function _get_var($name){
-                       $keys = array_map('trim',explode(".",$name));           
+               private function _get_var($name, $retNoKey=false){
+                       $keys = array_map('trim',explode(".",$name));
+                       if ($retNoKey && !array_key_exists($keys[0], $this->r)) return KEY_NOT_EXISTS;
                        $val = $this->r;
                        foreach($keys as $k) {
-                               $val = $val[$k];
+                               $val = (isset($val[$k]) ? $val[$k] : null);
                        }
                        return $val;
                }
@@ -79,8 +68,8 @@
                        } else {
                                $val = $this->_get_var($args[2]);
                        }
-                       list($strue, $sfalse)= preg_split("|{{ *else *}}|", $args[3]);
-                       return ($val?$strue:$sfalse);
+                       $x = preg_split("|{{ *else *}}|", $args[3]);
+                       return ( $val ? $x[0] : (isset($x[1]) ? $x[1] : ""));
                }
                
                /**
@@ -91,7 +80,7 @@
                 */
                private function _replcb_for($args){
                        $m = array_map('trim', explode(" as ", $args[2]));
-                       list($keyname, $varname) = explode("=>",$m[1]);
+                       @list($keyname, $varname) = explode("=>",$m[1]);
                        if (is_null($varname)) { $varname=$keyname; $keyname=""; }
                        if ($m[0]=="" || $varname=="" || is_null($varname)) die("template error: 'for ".$m[0]." as ".$varname."'") ;
                        //$vals = $this->r[$m[0]];
@@ -115,7 +104,15 @@
                 * {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }}
                 */
                private function _replcb_inc($args){
-                       list($tplfile, $newctx) = array_map('trim', explode("with",$args[2]));
+                       if (strpos($args[2],"with")) {
+                               list($tplfile, $newctx) = array_map('trim', explode("with",$args[2]));
+                       } else {
+                               $tplfile = trim($args[2]);
+                               $newctx = null;
+                       }
+                       
+                       if ($tplfile[0]=="$") $tplfile = $this->_get_var($tplfile);
+                       
                        $this->_push_stack();
                        $r = $this->r;
                        if (!is_null($newctx)) {
@@ -159,40 +156,34 @@
                        krsort($this->nodes);
                        return $s;
                }
+               
 
-               private function _str_replace($str){
-                       #$this->search,$this->replace,
-                       $searchs = $this->search;
-                       foreach($searchs as $search){
-                               $search = "|".preg_quote($search)."(\|[a-zA-Z0-9_]*)*|";
-                               $m = array();
-                               if (preg_match_all($search, $str,$m)){
-                                       foreach ($m[0] as $match){
-                                               $toks = explode("|",$match);
-                                               $val = $this->_get_var($toks[0]);
-                                               for($k=1; $k<count($toks); $k++){
-                                                       $func = $toks[$k];
-                                                       if (function_exists($func)) $val = $func($val);
-                                               }
-                                               if (count($toks)>1){
-                                                       $str = str_replace( $match, $val, $str);
-                                               } 
-                                       }
-                               }
+               private function var_replace($s){
+                       $m = array();
+                       /** regexp:
+                        * \$                                           literal $
+                        * (\[)?                                        optional open square bracket
+                        * ([a-zA-Z0-9-_]+\.?)+         var name, followed by optional
+                        *                                                      dot, repeated at least 1 time
+                        * (?(1)\])                                     if there was opened square bracket
+                        *                                                      (subgrup 1), match close bracket
+                        */
+                       if (preg_match_all('/\$(\[)?([a-zA-Z0-9-_]+\.?)+(?(1)\])/', $s,$m)){
                                
+                               foreach($m[0] as $var){
+                                       $varn = str_replace(array("[","]"), array("",""), $var);
+                                       $val = $this->_get_var($varn, true);
+                                       if ($val!=KEY_NOT_EXISTS)
+                                               $s = str_replace($var, $val, $s);
+                               }
                        }
-                       return str_replace($this->search,$this->replace, $str);
+                       
+                       return $s;
                }
-
        
                public function replace($s, $r) {
                        $this->r = $r;
-                       $this->search = array();
-                       $this->replace = array();
-
-                       $this->_build_replace($r, "");
                        
-                       #$s = str_replace(array("\n","\r"),array("§n§","§r§"),$s);
                        $s = $this->_build_nodes($s);
 
                        $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
@@ -200,11 +191,12 @@
                        
                        // remove comments block
                        $s = preg_replace('/{#[^#]*#}/', "" , $s);
+                       
                        // replace strings recursively (limit to 10 loops)
                        $os = ""; $count=0;
                        while($os!=$s && $count<10){
                                $os=$s; $count++;
-                               $s = $this->_str_replace($s);
+                               $s = $this->var_replace($s);
                        }
                        return template_unescape($s);
                }